Cable code signaling system



Aug. 8, 1933- M. H. WOODWARD CABLE CODE SIGNALING SYSTEM Filed March 4, 1932 ll| III III INVENTOR MARlON H. WOODWARP ATTORNEY Patented Aug. 8, 1933 UNITED s'r sg P-ATENT OFFICE I CABLE coma SIGNALING sYs'rnM Marion H. waouwara, East orangeyn. :1; as- Signor to International CommunicationsfLabm rato'ries, Inc., Newark, N.- J., a Corporation of NewYork in g Application March 4, 1932 Serial No. 596,771

:11 Claims. (c1-. 1"zs ;-ss)

This invention relates to improvements in ca ble codeprinters of the type ,disclosed'in United States Letters Patent No'; 1,395,095 issued to A. F;

Connery and H. Woodward. The "invention provides means for operating a ten-magnet cable code printer by circuits counting relay bank.

-One of the objects of the invention is'to pro "'A' further object oi this inventionis to provide means whereby allof theimpulses received are used to make 'a selection of a predetermined letter or number.

Further objects and. the means forv accomplishing them will be disclosed, or will be obvious to those versed in the art, upon-reading the specific'ation in conjunction with the accompanying drawing whichis a schematic diagram of acircuit employed to accomplish'the various objects of the invention. n

In the ordinary five-selecting-magnet multiplex printe'rjfive code -bars,"each c ontrolled by one of the five selecting magnets, are provided. Each code bar has 'twopositions, an operated position and-"an unoperated position. By proper selectionfthe five code'bars may be positioned to obtain thirty-two possiblepermutations. However well this system of operation may be for land lines where two-element codes, namely, plus printer isnot directly applicable to cablecode o'peration'because thecable code is a' three-element code consisting of plus, minus and zero ele- This invention provides a-novel method of operating the selector magnets of a printer from cable code signals. The longest letter in the'ca- "ble code is five units. By adding another set of five selecting magnets and selecting bars to the A developed view of the distributor is shown in the drawing. Means formai ntaining the discontrolled through a and minus element codes, are used,lthis type of printer, operation of the printer with cablecode,

tributor brushes in synchronism with cable si'gnals is well known and is not shownorrdescribed, since it forms no part of the invention. l 2' I Thearrangement of the apparatus is :such that adotina cable code combination will'cause the actuation of a selector magnet in one bank or p set of magnets-in the printen'thus positioning the code bar a'ssociated'therewith; while a dash will cause the actuation of a selector magnet in another lbankof magnets vinthe printer; and, likewise, set the code bar associated with that magnet. Take, for example, the letter.-A. .',,The cablecode signal for the letterisdot, dash. The

first unit of the letter A, being a dot, .will operate 1 5 the first co'de bar in the first or jdot bank of magnets. The second unit of the letter .A is a dash and will operate thesecond magnet in the'second or dash bank of magnets and, thus, will operate 1 the second "code bar in thecode bars'assjociatedj with the second set of magnets. l The letter spaces'are'usedtocauSe the operation ofthe printing functions of theprinter, to print the letter previously" selected by thesten selecting magnets. Since two. sets of five bars are actually used, any one of sixty-two different selections maybe obtained.

Inthe drawing, the set of five selecting magnets 'for the dot signals are numberedfrom l to 5, and theset of dash selecting magnets are numbered so e to 10. The first pulse'in each letter will cause eithermagnet 1 or magnet 6 tobe" operated. Magnet 1 will be operated if the first pulse is a dot; magnet 6,, if .thefirst pulseis'a dash. The second pulse in theletter will cause magnet 2'01- magnet 'l-to operate, dependingupon the polarity of the signaling impulse.- The third, fourth and fifth impulses will operate magnets. 3, 4, 5 or 8, 9,10, respectively, depending upon the polarity of the impulse. A system of relays provides the means for counting the number of pulses in each letter, in order tddete'rminewhich magnet is to be operated by each signal pulse. 'This isaccomplished by a group of counting relays which operate "in connection with the two input'relays andfthe constantspeed or synchronized distributon'which is maintained in synchronismwith the sending transmitter by any one of .a number of well known means; i In this system, it isnecessary to distinguish between one zero interval, which represents a letter space, and three zero intervals, which represent .a word space. The countingrelay bank which is used for counting the dot and dash 119 the distributor ring in synchronism with the insignaling impulses is also used for counting the space intervals. 7

In this system a counting relay chain bank is used to determine which magnets in the printer are to be selected, as described below, and no perforated tape or other storing means are necessary.

A more detailed description of the apparatus will now be given.

As shown in the drawing, relays 28 and 29 are operated by the incoming signals]. The tongue of relay 28 moves'to its marking contact whenever either dots or dashes are received, and is on its spacing contact for spaces. moves its tongue to its marking contact when dots are received, and its tongue is spaced whenever dashes or spaces are being received. The tongue of relay 28 operates relay 30, whose tongues-determine the endings of the various letters re--' ceived over the cable. Tongue 43. causes the counting relaysto be operated in the following manner: x

For a letter three unit impulses inlength, the

'* incomingsignalcauses tongue 43 to move'to its marking contact at a time when the brush on the distributor is midway between the A and B segments at the extreme left of the drawing.

A short time later the brushes revolving'over coming'signals reach the A segment, at which time a circuit is established from positive battery, through the A segment, through the tongue and spacing contact at 34, the winding of relay 31, through the marking contact and tongue at 43 to negative battery. Upon the completion of this circuit, contact is closed and a circuit is conditioned forenergization from positive battery, through the winding of relay 24, through contacts 35 and windings of relay 31 to negative battery, as before. Howevenwhil'e the brushes are on the A segment no current flows through winding 24, because this winding is short-circuited by the circuit through the A segment. When the brush'passes'off the, A segment, the short-circuiting path is open and current then flows through winding 24 and winding 31 to negative battery and, thus, these relays are locked up. For the 'next'impulse, when the brush again reached an Asegment, a circuit is then established from battery,'through the second A segment, the tongue and marking contact at 34, the tongue and spacing contact at 36, the winding of relay 32 to negative battery through the tongue and marking contact at 43; In the same manner as already described, a circuit is then set up from positive battery, through the windings of relay 25, contacts'3'7, the winding of relay'32 to negative battery. No current, however, flows in this cir- .cuit until the brush passes off the second A segment, at which time current flows through the windings of relay 25, contacts 37 and winding of relay 32, to negative battery, thus operating relay 25 and locking. up relay. 32. For the third impulse, the brushes again reachan A segment and a circuit is then established from battery,

through the third A segment, through the tongue and'marking contacts at 34, through the tongue and marking contacts at 36, through the tongue and spacing contacts at 33, through relay 33 to negative battery, through the tongue and marking contact at 43.

As before, a circuit is set up-from battery, through relay 26 and contacts 39 and relay 33, to negative battery, but no current flows until the brush passes from the third A segment. At

Relay 29 through this time relay 26 is operated and relay 33 is locked up. At the conclusion of the threeimpulses, the tongue at 43 moves, from its marking contact to its spacing contact. During the transition time, the locking circuits through windings 31, 32 and 33 are open, and these relays and relays 24, 25 and 26 are restored to their normal positions. Thus, these relays count the -number of impulses in any particular signal combination. For spaces, the tongue at 43 is on its spacing contact and the counting relays operate in the same direction and are unlocked during the transition time from spacing to marking. Relays 24, 25, 26 and 27 have other contacts which are associated with the selecting magnets of the printer. Whenever dots are received, acircuit is established from battery contact at 44, tongue and marking contact of relay 29, through contacts .11, 12, 13 and 14,

the B segment, tongue and markingas the case, may be, to operate selecting magprinter. The second space indicates a word space and the circuit is then further completed through the tongue and spacing contact at 44, through the tongue and marking contact at 19, through the tongue and spacing contact at 20, through the fourth selecting magnet which selects, a f

word space. The third space is, therefore, completed through the tongue and marking contact at 20, the tongue and spacing contact at 21, to the printing magnet 42 forprinting the word space.

Selecting magnets 1 to 10 are thus --'operated whenever their corresponding signalsare received, that is, whenthe counting relays have counted a sufficientnumber of impulses. Thus, for the letter F, which consistsof adot, dot, dash, dot, the'first impulseoperates the selecting magnet 1 through the tongue and spacing contact of 11. The second impulse operates the selecting magnet 2 through the tongue and spac ing contact at 12, thethird impulse operates selecting magnet 8 through. the tongue .and spacing contact at 1'7, and the fourth impulse operates the selecting magnet 4 throug the tongue and spacing contact at 14.

Whenever a signal has five impulses'thecharacter to be printed will be in the upper case.

,This is accomplished by a circuit through the B segment, the tongue and marking contact at 44, through the contacts at 22 to 'the shift magnet 41. Contacts 22 are closed for the fifth impulse. The printer is restored to the lower case mechanically whenever a word space is received.

The letter space at the end of each letter causes relay 28 to space, thereby de-energizing relay 30. This causes the circuits leading to the counting relays to be broken at tongue 43, whereupon the counting relays all go to spacing. Since tongue 44 also goes to spacing-position simultaneously with tongue 43, the B segment of the next pair of segments completes a circuit frompositive battery, the afore-mentioned B segment, the spacing contact of tongue 44, the spacing con- This description of the operation of the ap paratus is given as one embodiment of the in vention. It is not intended to limit the scope of the invention, which is defined in the appended claims.

What is claimed is: j 1. In a telegraph system, means for receiving signals composed of a non-uniform number of equal length impulses, recording means having a plurality of sets of selectable printer magnets, and means for operating the magnets of said sets in different combinations from the received signals.

2. In a telegraph system, means for receiving signals composed of-a noi1-uniform number of equal lengthimpulses, recording means having a plurality of sets of selectable printer magnets, and means for operating the magnets of said sets in accordance with the sequence of the impulses making up any particular signal. 7

3. In a telegraph system vherein signals of non-uniform duration composed of equal length elements are transmitted, signal recording means comprising a printing device having a plurality of sets of printer magnets, and means for controlling the'operation of the magnets of said sets in an order determinedby the order of the impulses in a received signal. A

4. In a telegraph system, means for receiving signals having a non-uniform number of uniform length impulses of various polarity, a receiving device comprising a printer and sets of selectors therefor, each of said sets having a plurality of selectable printer magnets, and means for operating said printer magnets according to received signals.

5. In a telegraph system, means for receiving signals composed of a non-uniform number of uniform length impulses, recording means having a plurality of sets of selectable printer magnets, and means for operating the magnets'of said sets in different combinations from the received signals, each impulse of said signal causing the operation of at least one magnet in said sets. j

6. In a telegraph system, means for receiving signals composed of a 'non-uniforml number of uniform length impulses, recording means having a plurality of sets of selectable printer mag;

nets, and means for operating the magnets of said sets in different combinations from the received signals, each-impulse, of said signal causing the operation of at least one magnet in said sets in a predetermined order. p I 7. In a telepgraph system, the combination of means for receiving signals in a code having letters of unequal length composed of equal length elements, a plurality of sets of selector magnets operable by signal combinations in said code, and relay means responsive to said signals to divert signals of the same polarity to the same set of selector magnets.

8. The method of operating a telegraph printer from a code having characters formed of unequal numbers of equal length impulses of dififerent kinds, which comprises operating one 7 set of selecting mechanisms of said printer by impulses of one kind, operating another set of selecting mechanisms of said printer by impulses of another kind, diverting said impulses to the corresponding of relays, and thereafter initiating the printing operation of said printer by impulses of a third kind.

9. In a telegraph system wherein signals comset of selecting mechanisms by operating a group posed of uniform length elements of positive,

negative and zero polarity are employed, relay means for receiving saidsignals, a distributor co-operating with said relay means to'control recording means comprising a telegraph printer having two sets of selecting mechanisms, the mechanisms in one'of said sets being selectively operated by the elements of positive polarity while the mechanisms in the other of said sets are selectively operated by the elements of negative polarity.

10. In a telegraph system wherein signals composed of equal length elements of positive, nega-.

of positive and negative polarity elements.

11. In a telegraph system wherein the signals transmitted are composed of a varying number of different kinds of uniform length elements, a plurality of sets of selecting mechanismsfeach of said sets being operable by one kind of element only, a shift mechanism operated by signals of, a predetermined length, and means for printing a charactercorresponding to said transmitted signals and the positions of said shift mechanismnv r I MARION H. WOODWARD. 

